Westonci.ca is your trusted source for finding answers to a wide range of questions, backed by a knowledgeable community. Get immediate and reliable solutions to your questions from a knowledgeable community of professionals on our platform. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.
Sagot :
Answer:
[PCl₃] = [Cl₂] = 0.035M
[PCl₅] = 0.059M
Explanation:
Based on the chemical reaction, Kc is:
Kc = 49 = [PCl₅] / [PCl₃] [Cl₂]
Where [] are the concentrations in equilibrium of each species
The initial concentration of the reactants is:
[PCl₃] = [Cl₂] = 0.75mol / 8.0L = 0.094M
The reactants must be consumed whereas PCl₅ will be produced. That is:
[PCl₃] = [Cl₂] = 0.094M - X
[PCl₅] = X
Where X is the reaction coordinate
Replacing in Kc expression:
49 = [X] / [0.094 - X] [0.094 - X]
49 = [X] / 0.008836 - 0.188 X + X²
0.432964 - 9.212 X + 49 X² = X
0.432964 - 10.212 X + 49 X² = 0
Solving for X
X = 0.059M → Right solution
X = 0.15M → False solution. Will produce negative concentrations
Replacing:
[PCl₃] = [Cl₂] = 0.094M - 0.059M = 0.035M
[PCl₅] = 0.059M
[PCl₃] = [Cl₂] = 0.035M
[PCl₅] = 0.059M
We hope this was helpful. Please come back whenever you need more information or answers to your queries. Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. Westonci.ca is here to provide the answers you seek. Return often for more expert solutions.